A system of communication that uses symbols in a regular way to create meaning is?

________ are composed of one or more ________.

The Ring of Fire, a well-defined zone and belt of volcanic activity, is also known as __________. 

Crater Lake National Park is not actually a crater, but rather, is an example of a caldera.

During ____ stage children use symbols to represent words, images and ideas.

Of all plate boundaries, igneous rocks are least likely to be found at:

Igneous rocks can only be formed from sedimentary rocks in the rock cycle.

Nonmetallic minerals are denser than metallic minerals.

Quartz (hardness value = 7) can scratch or cause abrasion to diamonds (hardness value = 10).

According to Bowen’s reaction series, which type of igneous material should form last, when magma temperatures are lowest?